Dental ImplantNCT06872177
Chart Review: Comparing the Position and Tilt of Dental Implants Versus Those of Natural Teeth
An observational study of Dental Implant, run by Ohio State University at 1 site in United States.
Trial summary
Background: When placing a dental implant, it is not always possible to place it exactly in the same position as the tooth that it replaced. That might be because of how the gums and mouth are shaped, since some bone is always lost after a tooth is extracted. Read more about this study
- Who is it for?
- Ages 18 to 85 years
- Conditions the study is for
- Dental Implant
- What is being tested?
- Measurements
- How many people
- 400 participants
- Where
- 1 siteUnited States
- Study dates
- 15 Mar 2026to May 2027
- Phase
- Observational
- Are there results?
- Not yet: the study is under way
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 to 85 years
- All sexes
- No healthy volunteers
- Adult, Older adult
Study population: Existing records of patients at the Ohio State University College of Dentistry who have had a dental implant of one single molar tooth, between January 1, 2016 and January 6, 2025
Who may be able to join
- Patients with mandibular molar implant placement.
- Presence of contralateral natural mandibular first, second molars or both.
- Availability of pre-extraction CBCT scans of the corresponding or contralateral mandibular molar tooth or panoramic radiographs for mesiodistal angulation.
- Availability of post-implant CBCT scans or panoramic radiographs for mesiodistal angulation
Who cannot join
- Incomplete or low-quality CBCT scans.
- History of mandibular trauma or pathologies altering tooth or implant alignment.
- History of reconstructive mandibular surgery in the implant region.
- History of periapical pathology
Trial locations and contacts
1 site in 1 country.
United States1 site
Ohio State University Dental Clinics
Columbus, Ohio, 43210
About this study
Official title: Axial Inclination of Mandibular Molar Dental Implants Versus Natural Teeth: What Are the Differences?
Background:
When placing a dental implant, it is not always possible to place it exactly in the same position as the tooth that it replaced. That might be because of how the gums and mouth are shaped, since some bone is always lost after a tooth is extracted. Researchers want to study the records of people who have had dental implants. They want to check to see how much difference there is between how the implant is positioned and how the same tooth on the other side is positioned. They also want to compare how the implant is positioned compared to the tooth it replaced, when that is possible in the dental record.
Read more
Study design:
This study will not enroll any participants. The researchers will search the database of patient records at the study clinic to find people who have had dental implants of a single molar tooth. Then they will look at them to find records that include good images that they can use to compare the implant and tooth positions.
Researchers will then analyze the findings and write a review article.
Read the detailed description
This is a retrospective chart review. Specifically, the clinic e-chart system will be used to locate patients who received implant surgery. E-charts from January 1, 2016, to January 6, 2025, with pre- and post-implant surgery tomography (CBCT) documentation will be identified and used for this study.
Demographic and clinical data (age, sex, systemic conditions, implant details and surgical treatment outcomes) related to these cases will be collected. Radiographic measurements will include the following:
- On tomography: 1. Buccolingual axial inclination of natural molars and implants. 2. Mesiodistal axial inclination of natural molars and implants. 3. Presence/absence of fenestration and/or dehiscence around implants 4. Proximity to mandibular canal and/or foramen mentale
- On Panoramic radiograph: Mesiodistal axial inclination of natural molars and implants.
- Conditions
- Dental Implant
- Being tested
- Measurements
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
MeasurementsOther
On existing identified chart records: measurements on CBCT and panographic radiographs.
| Study group | Role | What they receive |
|---|---|---|
| Chart Review | Existing records of patients at the Ohio State University College of Dentistry who had a dental implant of one single molar tooth between January 1, 2016 and January 6, 2025 Receives: Other: Measurements |
What is being measured
The primary outcome is the main question the study is designed to answer.
Replaced Tooth Comparison
Difference in buccolingual and mesiodistal angulations of placed implant compared with pre-extraction natural tooth.
Measured: Baseline (prior to tooth extraction), day 1 of implant placement, day 1 of crown placement (4-6 months after implant placement)
Contralateral Tooth Comparison
Difference in buccolingual and mesiodistal angulations of placed implant compared with contralateral natural molar.
Measured: Day 1 of implant placement, day 1 of crown placement (4-6 months after implant placement)
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted12 Mar 2025
- Study start15 Mar 2026
- Primary completionMay 2027 (estimated)
- Study completionMay 2027 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Dental ImplantStudies of the same condition, open and under way.
- More trials run by Ohio State UniversityThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Observational
- Observational model
- Other
- Time perspective
- Retrospective
- Enrolment
- 400 participants (estimated)
Sponsor and investigators
- Lead sponsor
- Ohio State University
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Binnaz Leblebicioglu, Ohio State University
- Investigators
- Binnaz Leblebicioglu, DDS, MMS, PhD, Principal investigator, Ohio State University
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT06872177
- Sponsor's protocol ID
- 2025H0006
- Status last verified
- Apr 2026
- First submitted
- 6 Mar 2025
- Last updated
- 28 Jul 2026
- Results posted
- No
- Data monitoring committee
- No
- Individual data sharing
- No
Study at a glance
From the registry record, last updated by the sponsor on 28 Jul 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Axial Inclination of Mandibular Molar Dental Implants Versus Natural Teeth: What Are the Differences?
- ClinicalTrials.gov ID
- NCT06872177
- Acronym / sponsor ID
- 2025H0006
- Conditions
- Dental Implant
- Study type
- Observational
- Recruitment status
- Active, not recruiting
- Enrolment
- 400 participants (estimated)
- Lead sponsor
- Ohio State UniversityUniversity, hospital or other
- Study start
- 15 Mar 2026 (actual)
- Primary completion
- May 2027 (estimated)
- Study completion
- May 2027 (estimated)
- First posted
- 12 Mar 2025 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
Background:
When placing a dental implant, it is not always possible to place it exactly in the same position as the tooth that it replaced. That might be because of how the gums and mouth are shaped, since some bone is always lost after a tooth is extracted. Researchers want to study the records of people who have had dental implants. They want to check to see how much difference there is between how the implant is positioned and how the same tooth on the other side is positioned. They also want to compare how the implant is positioned compared to the tooth it replaced, when that is possible in the dental record.
Study design:
This study will not enroll any participants. The researchers will search the database of patient records at the study clinic to find people who have had dental implants of a single molar tooth. Then they will look at them to find records that include good images that they can use to compare the implant and tooth positions.
Researchers will then analyze the findings and write a review article.
Detailed description
This is a retrospective chart review. Specifically, the clinic e-chart system will be used to locate patients who received implant surgery. E-charts from January 1, 2016, to January 6, 2025, with pre- and post-implant surgery tomography (CBCT) documentation will be identified and used for this study.
Demographic and clinical data (age, sex, systemic conditions, implant details and surgical treatment outcomes) related to these cases will be collected. Radiographic measurements will include the following:
- On tomography: 1. Buccolingual axial inclination of natural molars and implants. 2. Mesiodistal axial inclination of natural molars and implants. 3. Presence/absence of fenestration and/or dehiscence around implants 4. Proximity to mandibular canal and/or foramen mentale
- On Panoramic radiograph: Mesiodistal axial inclination of natural molars and implants.
Study design
- Observational model
- Other
- Time perspective
- Retrospective
- Number of arms
- 1
| Arm | Type | Receives |
|---|---|---|
| Chart Review | – | Other: MeasurementsExisting records of patients at the Ohio State University College of Dentistry who had a dental implant of one single molar tooth between January 1, 2016 and January 6, 2025 |
Who may qualify
- Ages
- 18 to 85 years
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
- Study population
- Existing records of patients at the Ohio State University College of Dentistry who have had a dental implant of one single molar tooth, between January 1, 2016 and January 6, 2025
Key inclusion criteria (4 listed)
- Patients with mandibular molar implant placement.
- Presence of contralateral natural mandibular first, second molars or both.
- Availability of pre-extraction CBCT scans of the corresponding or contralateral mandibular molar tooth or panoramic radiographs for mesiodistal angulation.
- Availability of post-implant CBCT scans or panoramic radiographs for mesiodistal angulation
Key exclusion criteria (4 listed)
- Incomplete or low-quality CBCT scans.
- History of mandibular trauma or pathologies altering tooth or implant alignment.
- History of reconstructive mandibular surgery in the implant region.
- History of periapical pathology
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| MeasurementsOn existing identified chart records: measurements on CBCT and panographic radiographs. | Other | Chart Review |
Primary outcome
Replaced Tooth Comparison
Time frame: Baseline (prior to tooth extraction), day 1 of implant placement, day 1 of crown placement (4-6 months after implant placement)
Difference in buccolingual and mesiodistal angulations of placed implant compared with pre-extraction natural tooth.
Contralateral Tooth Comparison
Time frame: Day 1 of implant placement, day 1 of crown placement (4-6 months after implant placement)
Difference in buccolingual and mesiodistal angulations of placed implant compared with contralateral natural molar.
Results and safety
This study is still under way. Results are not available in the source record yet.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 28 Jul 2026.
- Individual participant dataSharing planned: No
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Binnaz Leblebicioglu, DDS, MMS, PhD principal investigator
Ohio State University
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
An observational study of Dental Implant, run by Ohio State University at 1 site in United States.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 4 inclusion and 4 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: under way, not looking for participants, as of the sponsor's last update on 28 Jul 2026. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in United States. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
This study is still under way. Results are not available in the source record yet.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Replaced Tooth Comparison (time frame: Baseline (prior to tooth extraction), day 1 of implant placement, day 1 of crown placement (4-6 months after implant placement)). The study lists 2 primary outcomes in all. It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 28 Jul 2026.